Antioch, California:IS_PART_OF:Contra Costa County, California####Antioch, California:IS_PART_OF:California####California:LANGUAGE:English language####Contra Costa County, California:IS_PART_OF:San Francisco Bay Area####Antioch, California:LEADER_TITLE:California's 11th State Assembly district
Antioch is in Contra Costa County which is part of the San Francisco Bay area, in California, a state where English is spoken. Antioch forms California's 11th State Assembly district.